Avoid using document.all

[pifantastic]

document.all returns an HTMLAllCollection which has some, uhm, special, behavior. This is causing errors when es6-shim is present, which in some cases overwrites the native Array.prototype.find with its own implementation.

This is an attempt to prevent vue-devtools from throwing an error in Chrome when es6-shim is present.

See: paulmillr/es6-shim#428

[ljharb]

It's also worth noting that document.all has been heavily deprecated for almost a decade now, and should never be used, regardless of library bugs with it.